: Very rare, unstable early builds of "Threshold" (the codename for what became Windows 10) may exist on archive sites, but these are intended for researchers and are not suitable for daily use. Why Did Microsoft Skip Windows 9?
: Some community-made "Windows 9" files are actually modified versions of Windows 7 or 8 with new skins, icons, and third-party software. windows 9 iso file download free 64 bit upd
Since an official Windows 9 does not exist, any website offering a "Windows 9 ISO free 64-bit download" is likely distributing one of the following: : Very rare, unstable early builds of "Threshold"
While Microsoft has never given one single "official" reason, tech experts and developers point to several key factors that led to the skip: : Very rare
The Windows 9 Mystery: Why You Can't Download What Doesn't Exist